Page Ruler Measure elements on Firefox web pages
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measure firefox ruler firefox addon

Page Ruler Description

This Firefox extension was designed to implement a lightweight ruler to measure web page elements. The status bar shows a widget coloured icon if the mod is available, and grey if not. To display the ruler, you just have to click on the widget icon, or use the keyboard shortcut "Ctrl + M". Once displayed, the ruler displays information, is draggable, and resizable.

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